The product uses environmentally friendly pvc film inside, and the heat preservation effect is up to 4 hours; The ice retention duration is 12-24 hours; Large capacity, strong load bearing, can meet the needs of office workers for two meals a day; Equipped with portable ribbon, there are plastic snaps on both sides of the bag, which can be carried easily and easily; Two-way metal zipper, smooth opening and closing; There are front pockets, left and right pockets for convenient storage of mobile phones, paper towels, small objects, etc.